 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.runtime.internal.adaptor;

 import java.util.Date ;
 import org.eclipse.osgi.service.resolver.*;
 import org.eclipse.osgi.util.NLS;

 /**
  * @since 3.3
  */
 public class MessageHelper {
     public static String getResolutionFailureMessage(VersionConstraint unsatisfied) {
         if (unsatisfied.isResolved())
             throw new IllegalArgumentException ();
         if (unsatisfied instanceof ImportPackageSpecification)
             return NLS.bind(EclipseAdaptorMsg.ECLIPSE_MISSING_IMPORTED_PACKAGE, toString(unsatisfied));
         else if (unsatisfied instanceof BundleSpecification)
             if (((BundleSpecification) unsatisfied).isOptional())
                 return NLS.bind(EclipseAdaptorMsg.ECLIPSE_MISSING_OPTIONAL_REQUIRED_BUNDLE, toString(unsatisfied));
             else
                 return NLS.bind(EclipseAdaptorMsg.ECLIPSE_MISSING_REQUIRED_BUNDLE, toString(unsatisfied));
         else
             return NLS.bind(EclipseAdaptorMsg.ECLIPSE_MISSING_HOST, toString(unsatisfied));
     }

     /**
      * Print a debug message to the console.
      * Pre-pend the message with the current date and the name of the current thread.
      */
     public static void debug(String message) {
         StringBuffer buffer = new StringBuffer ();
         buffer.append(new Date (System.currentTimeMillis()));
         buffer.append(" - ["); //$NON-NLS-1$
 buffer.append(Thread.currentThread().getName());
         buffer.append("] "); //$NON-NLS-1$
 buffer.append(message);
         System.out.println(buffer.toString());
     }

     private static String toString(VersionConstraint constraint) {
         org.eclipse.osgi.service.resolver.VersionRange versionRange = constraint.getVersionRange();
         if (versionRange == null)
             return constraint.getName();
         return constraint.getName() + '_' + versionRange;
     }

 }

